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for free. This is an OCR edition with typos. Excerpt from book: By
John Strong Newberry. DESCRIPTIONS OF SPECIES. PTERIDOPHYTA. Order
FILICINjE. Lygodium Kaulpussi Heer. PI. LXII, figs. 1-4. Fl.
Skopau; Beitr. naher Kent. Sachs. -Thuring. Braunkohl, Vol." XVIII
(1861), p. 409, PI. VIII, fig. 21; IX, fig. 1. Lygodium
neuropteraides Lesq. Hayden-s Ann. Rept. 1870 1872], p. 384; Tert.
Fl. (1878), p. 61, PI. V, fig. 4-7; VI, fig. 1. Dr. C. A. White has
collected from the Green River shales a splendid series of the
fronds of a Lygodium which is apparently identical with that
described by Lesquereux under the above name. These illustrate the
growth of the plant far better than those he figures, and some of
the more interesting and instructive ones are therefore now
figured. Coming all from the same locality, indeed thickly impacted
together and having the same nervation, they unquestionably
represent a single species, and yet it will be seen that if
diversity of form were accepted as affording specific distinctions
half a dozen species might be made from them; hence we are taught
by them that the fossil species of Lygodium already described are
based on too insufficient material, and should have comparatively
little weight until confirmed by further evidence. The number of
figures now given, however, enable us to define this species in
such a way that it is not liable to be mistaken. As these fronds
occur in the rock, the margins seem to be undulated and the lobes
considerably curved and twisted. How much of this is due Mon xxxv -
1 1 to contraction in drying before they were submerged and how
much is natural it is now impossible to say; but specimens from
Currant Creek, Oregon, exhibit the same peculiarity, the lobes
being sometimes almost fan-shaped, the margins waved or involute,
and recalling by their mode of g...
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